羟基自由基和水合电子降解对叔丁基酚的研究

采用电子束辐照水溶液的方法产生水合电子（e_aq^-），研究了e_aq^-与对叔丁基酚（4-t-BP）的反应，结果表明还原性的e_aq^-不能降解4-t-BP.同时，采用254nm紫外光辐照H₂O₂来产生羟基自由基（·OH），研究了UV//H₂O₂体系对4-t-BP的降解效果，考察了4-t-BP初始浓度，H₂O₂的添加浓度，溶液初始pH值等因素对反应的影响，结果表明4-t-BP初始浓度越低，H₂O₂的浓度越高，则越有利于反应的进行；溶液pH=6时是反应的最佳pH值.采用HPLC结合GC-MS的分析方法对反应的中间产物进行了定性分析，得出对叔丁基邻苯二酚，对叔丁基酚二聚体和对苯二酚等3种主要中间产物，归纳总结了4-t-BP与·OH的反应路径.

The study on the degradation of 4-tert-butylphenol by hydroxyl radical and hydrated electron attacking

In this paper, the hydrated electron (e_aq^-) was formed by the electron beam irradiation of water and the result showed that the reductive e_aq^- could not degrade 4-tert-butylphenol (4-t-BP). The hydroxyl radical (·OH) was formed by the UV_254nm irradiation of H₂O₂ and the degradation of 4-t-BP was very efficient. The experimental parameters such as initial concentration of 4-t-BP, H₂O₂ adding concentration and pH value of the solution were discussed. The results showed that low concentration of 4-t-BP and high concentration of H₂O₂ were favorable to the reaction. The optimum pH was 6. The intermediate products were analyzed by HPLC and GC-MS. 4-tert-butylcatechol, 4-tert-butylphenol dimer and hydroquinone were detected. The 4-t-BP degradation pathway was summarized according to these intermediate products.